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In 1870 Kostiantynivka was founded by a land owner Nomikossov who built the settlement in honor of his oldest son, Kostiantyn. In the beginning of the 20th century Kostiantynivka developed into an industrial settlement, and was later raised into the rank of an urban type (1926). In 1932 Kostyantynivka was granted municipal rights.

During the Russian military intervention in Ukraine, the town was captured in mid-April 2014[2][3] by pro-Russian separatists.[4][3] The city was eventually retaken by Ukrainian forces on 7 July 2014, along with Druzhkivka.[5][6] In September 2014, refuges intensively arrive to the town from occupied by terrorists and Russian military forces territories. People come to buy cheaper essential products, as well as to arrange pensions and social benefits in the municipal institutions. At the same time, simplified the mechanism of receiving benefits and social payments for migrants at a new place of residence was simplified. The city began to operate a refugee housing center.